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I have the same TV with what seems to be the same problem (screen off, audio remains until turning off->on); posted in several places (including here) but yet to receive a conclusive advice.
Please check the following:
- Does the screen turn off exactly 5 min. later - or when high brightness frames come up (could be 1...2...15 min. into the run;you can check that by pausing on a dark frame for a while)?
- Try altering the set to 4:3, low definition (did mine through my UVerse menus) as well as manually reducing the brightness settings; see if this gives you longer screen activity (I often manage for several hours, until some stupid commercial has a few seconds of a bright-white screen).
If we are indeed both in the same boat, my findings thus far are: This is not a lamp issue (changed, no difference); not a color wheel issue (changed a couple of months before this ****); probably not a temperature issue - though I'm still checking that.
I'm hoping it's the ballast; will soon check and LYK. Good luck.
Hi,Yes your problem sounds like the DMD board.This is how it works: http://electronics.howstuffworks.com/dlp1.htm Basically the light of the lamp goes through a tunnel that carries a color wheel(rotating disc with a gamma of colors that creates the colors on your tv)then the light of the lamp goes through the DMD board which is a chip composed of around 2 million pixels that creates the images and colors.When it starts to fail it will create black bars,pixelation,color distortion or white dots on screens. Here's a video that will help you find where the DMd chip is located : http://www.youtube.com/watch?v=0jr_9A5Xd2Q Have a blessed one!
This could be your video board going bad where your input cables are connected --OR-- the color wheel going bad. Hard to tell without a photo or reference though. Try swapping the cables first... and listen for any winding or whirring sounds.
tv is drawing too much current and protection circuit kicks on and shuts tv down. try turning all screen controls all the way down. if that doesnt fix it, sounds like bad green picture tube. suggest local service center
After being on a little while, the screen goes black (no audio as well) for 20 to 30 seconds. Green light stays on. Then, picture comes back on and takes a couple of seconds to get up to full brightness. About 5 seconds or so after the video comes back, the audio returns.
Until this morning, has only happened a couple of times a day, now happening more often. About 3 times in last 20 minutes.
I had the same exact problem.
I removed the bulb and cleaned it. There is a small screen at the top of the bulb and it was covered with dust. Once it was cleaned I replaced the bulb and it solved the problem.
Thanks to those who posted the solutions